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Finding the Fourth Proportional to 78,318.62, 108,131.74 and 46,497.74

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Solution

The fourth proportional to 78,318.62, 108,131.74 and 46,497.74 is: 64,197.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,318.62 : 108,131.74 = 46,497.74 : x
  2. Step 2: Convert to fraction form
    78,318.62/108,131.74 = 46,497.74/x
  3. Step 3: Cross multiply
    78,318.62x = 108,131.74 × 46,497.74
  4. Step 4: Simplify right side
    78,318.62x = 5,027,881,532.27
  5. Step 5: Solve for x
    x = 5,027,881,532.27/78,318.62
  6. Step 6: Final answer
    x = 64,197.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.